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Trying to fix some rounding, not sure it's actually correct yet

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This commit is contained in:
Randy Heit 2016-04-28 21:07:17 -05:00
parent 3bbb5c7237
commit 96228ca15f
1 changed files with 11 additions and 44 deletions
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55
src/r_segs.cpp
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@ -1134,7 +1134,7 @@ void wallscan (int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *l
dc_count = y2ve[0] - y1ve[0];
iscale = swal[x] * yrepeat;
dc_iscale = xs_ToFixed(fracbits, iscale);
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 1));
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 0.5));
dovline1();
}
@ -1153,7 +1153,7 @@ void wallscan (int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *l
bufplce[z] = getcol (rw_pic, (lwal[x+z] + xoffset) >> FRACBITS);
iscale = swal[x + z] * yrepeat;
vince[z] = xs_ToFixed(fracbits, iscale);
vplce[z] = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[z] - CenterY + 1));
vplce[z] = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[z] - CenterY + 0.5));
}
if (bad == 15)
{
@ -1229,7 +1229,7 @@ void wallscan (int x1, int x2, short *uwal, short *dwal, float *swal, fixed_t *l
dc_count = y2ve[0] - y1ve[0];
iscale = swal[x] * yrepeat;
dc_iscale = xs_ToFixed(fracbits, iscale);
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 1));
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 0.5));
dovline1();
}
@ -1484,7 +1484,7 @@ void maskwallscan (int x1, int x2, short *uwal, short *dwal, float *swal, fixed_
dc_count = y2ve[0] - y1ve[0];
iscale = swal[x] * yrepeat;
dc_iscale = xs_ToFixed(fracbits, iscale);
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 1));
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 0.5));
domvline1();
}
@ -1501,7 +1501,7 @@ void maskwallscan (int x1, int x2, short *uwal, short *dwal, float *swal, fixed_
bufplce[z] = getcol (rw_pic, (lwal[dax] + xoffset) >> FRACBITS);
iscale = swal[dax] * yrepeat;
vince[z] = xs_ToFixed(fracbits, iscale);
vplce[z] = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[z] - CenterY + 1));
vplce[z] = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[z] - CenterY + 0.5));
}
if (bad == 15)
{
@ -1575,7 +1575,7 @@ void maskwallscan (int x1, int x2, short *uwal, short *dwal, float *swal, fixed_
dc_count = y2ve[0] - y1ve[0];
iscale = swal[x] * yrepeat;
dc_iscale = xs_ToFixed(fracbits, iscale);
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 1));
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 0.5));
domvline1();
}
@ -1660,7 +1660,7 @@ void transmaskwallscan (int x1, int x2, short *uwal, short *dwal, float *swal, f
dc_count = y2ve[0] - y1ve[0];
iscale = swal[x] * yrepeat;
dc_iscale = xs_ToFixed(fracbits, iscale);
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 1));
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 0.5));
tmvline1();
}
@ -1677,7 +1677,7 @@ void transmaskwallscan (int x1, int x2, short *uwal, short *dwal, float *swal, f
bufplce[z] = getcol (rw_pic, (lwal[dax] + xoffset) >> FRACBITS);
iscale = swal[dax] * yrepeat;
vince[z] = xs_ToFixed(fracbits, iscale);
vplce[z] = xs_ToFixed(fracbits, dc_texturemid + vince[z] * (y1ve[z] - CenterY + 1));
vplce[z] = xs_ToFixed(fracbits, dc_texturemid + vince[z] * (y1ve[z] - CenterY + 0.5));
}
if (bad == 15)
{
@ -1754,7 +1754,7 @@ void transmaskwallscan (int x1, int x2, short *uwal, short *dwal, float *swal, f
dc_count = y2ve[0] - y1ve[0];
iscale = swal[x] * yrepeat;
dc_iscale = xs_ToFixed(fracbits, iscale);
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 1));
dc_texturefrac = xs_ToFixed(fracbits, dc_texturemid + iscale * (y1ve[0] - CenterY + 0.5));
tmvline1();
}
@ -2683,7 +2683,6 @@ int OWallMost (short *mostbuf, double z, const FWallCoords *wallc)
}
ix1 = wallc->sx1; iy1 = wallc->sz1;
ix2 = wallc->sx2; iy2 = wallc->sz2;
#if 1
if (bad & 3)
{ // the line intersects the top of the screen
double t = (z-s1) / (s2-s1);
@ -2728,40 +2727,8 @@ int OWallMost (short *mostbuf, double z, const FWallCoords *wallc)
else
{
fixed_t yinc = FLOAT2FIXED(((z * InvZtoScale / iy2) - y) / (ix2 - ix1));
qinterpolatedown16short (&mostbuf[ix1], ix2-ix1, FLOAT2FIXED(y + CenterY), yinc);
qinterpolatedown16short (&mostbuf[ix1], ix2-ix1, FLOAT2FIXED(y + CenterY) + FRACUNIT/2, yinc);
}
#else
double max = viewheight;
double zz = z / 65536.0;
#if 0
double z1 = zz * InvZtoScale / wallc->sz1;
double z2 = zz * InvZtoScale / wallc->sz2 - z1;
z2 /= (wallc->sx2 - wallc->sx1);
z1 += centeryfrac / 65536.0;
for (int x = wallc->sx1; x < wallc->sx2; ++x)
{
mostbuf[x] = xs_RoundToInt(clamp(z1, 0.0, max));
z1 += z2;
}
#else
double top, bot, i;
i = wallc->sx1 - centerx;
top = WallT.UoverZorg + WallT.UoverZstep * i;
bot = WallT.InvZorg + WallT.InvZstep * i;
double cy = centeryfrac / 65536.0;
for (int x = wallc->sx1; x < wallc->sx2; x++)
{
double frac = top / bot;
double scale = frac * WallT.DepthScale + WallT.DepthOrg;
mostbuf[x] = xs_RoundToInt(clamp(zz / scale + cy, 0.0, max));
top += WallT.UoverZstep;
bot += WallT.InvZstep;
}
#endif
#endif
return bad;
}
@ -2914,7 +2881,7 @@ int WallMost (short *mostbuf, const secplane_t &plane, const FWallCoords *wallc)
else
{
fixed_t yinc = FLOAT2FIXED(((z2 * InvZtoScale / iy2) - y) / (ix2-ix1));
qinterpolatedown16short (&mostbuf[ix1], ix2-ix1, FLOAT2FIXED(y + CenterY), yinc);
qinterpolatedown16short (&mostbuf[ix1], ix2-ix1, FLOAT2FIXED(y + CenterY) + FRACUNIT/2, yinc);
}
return bad;